为什么进入不了低功耗

[PM] prevent status:0x00000000 0x00000000 

[PM] sleep enable:yes  ultra sleep enable:no

[PM] checker:  cb_addr:0x00432E95(2) cb_addr:0x0043270D(1) cb_addr:0x0042F879(0) 

[PM] store_cb: cb_addr:0x00432719 cb_addr:0x0042CFD9 cb_addr:0x0042F88D 

[PMU] wakeup pin: 0x00000000(cur_level: 0x00000000 sleep_level: 0x00000000)

[PMU] pull up: 0x03E3605F(cur_level:0x03E3605F) pull down: 0x00040400(cur_level:0x00000000) all cur_level: 0x03F379FF

[PMU] clocking CPU[64MHZ]

现在里面的log打印是这个样子，为什么进入不了低功耗

static void pm_sleep_notify_handler(pm_sleep_state_t sleep_state, pm_status_t power_status)

{

    switch(sleep_state)

    {

       case PM_SLEEP_ENTRY:

            OM_LOG_DEBUG("> Deep Sleep\n");

            break;

这个函数里面没有打印出来